/*
 * Copyright (C) 2016 Rob Clark <robclark@freedesktop.org>
 * Copyright © 2018 Google, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Authors:
 *    Rob Clark <robclark@freedesktop.org>
 */

#include <stdio.h>

#include "pipe/p_state.h"
#include "util/u_string.h"
#include "util/u_memory.h"
#include "util/u_inlines.h"
#include "util/format/u_format.h"

#include "freedreno_draw.h"
#include "freedreno_log.h"
#include "freedreno_state.h"
#include "freedreno_resource.h"

#include "fd6_blitter.h"
#include "fd6_gmem.h"
#include "fd6_context.h"
#include "fd6_draw.h"
#include "fd6_emit.h"
#include "fd6_program.h"
#include "fd6_format.h"
#include "fd6_resource.h"
#include "fd6_zsa.h"
#include "fd6_pack.h"

/**
 * Emits the flags registers, suitable for RB_MRT_FLAG_BUFFER,
 * RB_DEPTH_FLAG_BUFFER, SP_PS_2D_SRC_FLAGS, and RB_BLIT_FLAG_DST.
 */
void
fd6_emit_flag_reference(struct fd_ringbuffer *ring, struct fd_resource *rsc,
		int level, int layer)
{
	if (fd_resource_ubwc_enabled(rsc, level)) {
		OUT_RELOC(ring, rsc->bo, fd_resource_ubwc_offset(rsc, level, layer), 0, 0);
		OUT_RING(ring,
				A6XX_RB_MRT_FLAG_BUFFER_PITCH_PITCH(fdl_ubwc_pitch(&rsc->layout, level)) |
				A6XX_RB_MRT_FLAG_BUFFER_PITCH_ARRAY_PITCH(rsc->layout.ubwc_layer_size >> 2));
	} else {
		OUT_RING(ring, 0x00000000);    /* RB_MRT_FLAG_BUFFER[i].ADDR_LO */
		OUT_RING(ring, 0x00000000);    /* RB_MRT_FLAG_BUFFER[i].ADDR_HI */
		OUT_RING(ring, 0x00000000);
	}
}

static void
emit_mrt(struct fd_ringbuffer *ring, struct pipe_framebuffer_state *pfb,
		const struct fd_gmem_stateobj *gmem)
{
	unsigned char mrt_comp[A6XX_MAX_RENDER_TARGETS] = {0};
	unsigned srgb_cntl = 0;
	unsigned i;

	unsigned max_layer_index = 0;

	for (i = 0; i < pfb->nr_cbufs; i++) {
		enum a6xx_format format = 0;
		enum a3xx_color_swap swap = WZYX;
		bool sint = false, uint = false;
		struct fd_resource *rsc = NULL;
		struct fdl_slice *slice = NULL;
		uint32_t stride = 0;
		uint32_t offset;
		uint32_t tile_mode;

		if (!pfb->cbufs[i])
			continue;

		mrt_comp[i] = 0xf;

		struct pipe_surface *psurf = pfb->cbufs[i];
		enum pipe_format pformat = psurf->format;
		rsc = fd_resource(psurf->texture);
		if (!rsc->bo)
			continue;
				
		uint32_t base = gmem ? gmem->cbuf_base[i] : 0;
		slice = fd_resource_slice(rsc, psurf->u.tex.level);
		format = fd6_pipe2color(pformat);
		sint = util_format_is_pure_sint(pformat);
		uint = util_format_is_pure_uint(pformat);

		if (util_format_is_srgb(pformat))
			srgb_cntl |= (1 << i);

		offset = fd_resource_offset(rsc, psurf->u.tex.level,
				psurf->u.tex.first_layer);

		stride = fd_resource_pitch(rsc, psurf->u.tex.level);
		swap = fd6_resource_swap(rsc, pformat);

		tile_mode = fd_resource_tile_mode(psurf->texture, psurf->u.tex.level);
		max_layer_index = psurf->u.tex.last_layer - psurf->u.tex.first_layer;

		debug_assert((offset + slice->size0) <= fd_bo_size(rsc->bo));

		OUT_REG(ring,
			A6XX_RB_MRT_BUF_INFO(i,
				.color_format = format,
				.color_tile_mode = tile_mode,
				.color_swap = swap),
			A6XX_RB_MRT_PITCH(i, .a6xx_rb_mrt_pitch = stride),
			A6XX_RB_MRT_ARRAY_PITCH(i, .a6xx_rb_mrt_array_pitch = slice->size0),
			A6XX_RB_MRT_BASE(i, .bo = rsc->bo, .bo_offset = offset),
			A6XX_RB_MRT_BASE_GMEM(i, .unknown = base));

		OUT_REG(ring,
				A6XX_SP_FS_MRT_REG(i, .color_format = format,
						.color_sint = sint, .color_uint = uint));

		OUT_PKT4(ring, REG_A6XX_RB_MRT_FLAG_BUFFER(i), 3);
		fd6_emit_flag_reference(ring, rsc,
				psurf->u.tex.level, psurf->u.tex.first_layer);
	}

	OUT_REG(ring, A6XX_RB_SRGB_CNTL(.dword = srgb_cntl));
	OUT_REG(ring, A6XX_SP_SRGB_CNTL(.dword = srgb_cntl));

	OUT_REG(ring, A6XX_RB_RENDER_COMPONENTS(
		.rt0 = mrt_comp[0],
		.rt1 = mrt_comp[1],
		.rt2 = mrt_comp[2],
		.rt3 = mrt_comp[3],
		.rt4 = mrt_comp[4],
		.rt5 = mrt_comp[5],
		.rt6 = mrt_comp[6],
		.rt7 = mrt_comp[7]));

	OUT_REG(ring, A6XX_SP_FS_RENDER_COMPONENTS(
		.rt0 = mrt_comp[0],
		.rt1 = mrt_comp[1],
		.rt2 = mrt_comp[2],
		.rt3 = mrt_comp[3],
		.rt4 = mrt_comp[4],
		.rt5 = mrt_comp[5],
		.rt6 = mrt_comp[6],
		.rt7 = mrt_comp[7]));

	OUT_REG(ring, A6XX_GRAS_MAX_LAYER_INDEX(max_layer_index));
}

static void
emit_zs(struct fd_ringbuffer *ring, struct pipe_surface *zsbuf,
		const struct fd_gmem_stateobj *gmem)
{
	if (zsbuf) {
		struct fd_resource *rsc = fd_resource(zsbuf->texture);
		enum a6xx_depth_format fmt = fd6_pipe2depth(zsbuf->format);
		uint32_t stride = fd_resource_pitch(rsc, 0);
		uint32_t size = fd_resource_slice(rsc, 0)->size0;
		uint32_t base = gmem ? gmem->zsbuf_base[0] : 0;
		uint32_t offset = fd_resource_offset(rsc, zsbuf->u.tex.level,
				zsbuf->u.tex.first_layer);

		OUT_REG(ring,
			A6XX_RB_DEPTH_BUFFER_INFO(.depth_format = fmt),
			A6XX_RB_DEPTH_BUFFER_PITCH(.a6xx_rb_depth_buffer_pitch = stride),
			A6XX_RB_DEPTH_BUFFER_ARRAY_PITCH(.a6xx_rb_depth_buffer_array_pitch = size),
			A6XX_RB_DEPTH_BUFFER_BASE(.bo = rsc->bo, .bo_offset = offset),
			A6XX_RB_DEPTH_BUFFER_BASE_GMEM(.dword = base));

		OUT_REG(ring, A6XX_GRAS_SU_DEPTH_BUFFER_INFO(.depth_format = fmt));

		OUT_PKT4(ring, REG_A6XX_RB_DEPTH_FLAG_BUFFER_BASE_LO, 3);
		fd6_emit_flag_reference(ring, rsc,
				zsbuf->u.tex.level, zsbuf->u.tex.first_layer);

		if (rsc->lrz) {
			OUT_REG(ring, 
				A6XX_GRAS_LRZ_BUFFER_BASE(.bo = rsc->lrz),
				A6XX_GRAS_LRZ_BUFFER_PITCH(.pitch = rsc->lrz_pitch),
				// XXX a6xx seems to use a different buffer here.. not sure what for..
				A6XX_GRAS_LRZ_FAST_CLEAR_BUFFER_BASE_LO(0),
				A6XX_GRAS_LRZ_FAST_CLEAR_BUFFER_BASE_HI(0));
		} else {
			OUT_PKT4(ring, REG_A6XX_GRAS_LRZ_BUFFER_BASE_LO, 5);
			OUT_RING(ring, 0x00000000);
			OUT_RING(ring, 0x00000000);
			OUT_RING(ring, 0x00000000);     /* GRAS_LRZ_BUFFER_PITCH */
			OUT_RING(ring, 0x00000000);     /* GRAS_LRZ_FAST_CLEAR_BUFFER_BASE_LO */
			OUT_RING(ring, 0x00000000);
		}

		/* NOTE: blob emits GRAS_LRZ_CNTL plus GRAZ_LRZ_BUFFER_BASE
		 * plus this CP_EVENT_WRITE at the end in it's own IB..
		 */
		OUT_PKT7(ring, CP_EVENT_WRITE, 1);
		OUT_RING(ring, CP_EVENT_WRITE_0_EVENT(UNK_25));

		if (rsc->stencil) {
			stride = fd_resource_pitch(rsc->stencil, 0);
			size = fd_resource_slice(rsc->stencil, 0)->size0;
			uint32_t base = gmem ? gmem->zsbuf_base[1] : 0;

			OUT_REG(ring,
				A6XX_RB_STENCIL_INFO(.separate_stencil = true),
				A6XX_RB_STENCIL_BUFFER_PITCH(.a6xx_rb_stencil_buffer_pitch = stride),
				A6XX_RB_STENCIL_BUFFER_ARRAY_PITCH(.a6xx_rb_stencil_buffer_array_pitch = size),
				A6XX_RB_STENCIL_BUFFER_BASE(.bo = rsc->stencil->bo),
				A6XX_RB_STENCIL_BUFFER_BASE_GMEM(.dword = base));
		} else {
			OUT_REG(ring, A6XX_RB_STENCIL_INFO(0));
		}
	} else {
		OUT_PKT4(ring, REG_A6XX_RB_DEPTH_BUFFER_INFO, 6);
		OUT_RING(ring, A6XX_RB_DEPTH_BUFFER_INFO_DEPTH_FORMAT(DEPTH6_NONE));
		OUT_RING(ring, 0x00000000);    /* RB_DEPTH_BUFFER_PITCH */
		OUT_RING(ring, 0x00000000);    /* RB_DEPTH_BUFFER_ARRAY_PITCH */
		OUT_RING(ring, 0x00000000);    /* RB_DEPTH_BUFFER_BASE_LO */
		OUT_RING(ring, 0x00000000);    /* RB_DEPTH_BUFFER_BASE_HI */
		OUT_RING(ring, 0x00000000);    /* RB_DEPTH_BUFFER_BASE_GMEM */

		OUT_REG(ring, A6XX_GRAS_SU_DEPTH_BUFFER_INFO(.depth_format = DEPTH6_NONE));

		OUT_PKT4(ring, REG_A6XX_GRAS_LRZ_BUFFER_BASE_LO, 5);
		OUT_RING(ring, 0x00000000);    /* RB_DEPTH_FLAG_BUFFER_BASE_LO */
		OUT_RING(ring, 0x00000000);    /* RB_DEPTH_FLAG_BUFFER_BASE_HI */
		OUT_RING(ring, 0x00000000);    /* GRAS_LRZ_BUFFER_PITCH */
		OUT_RING(ring, 0x00000000);    /* GRAS_LRZ_FAST_CLEAR_BUFFER_BASE_LO */
		OUT_RING(ring, 0x00000000);    /* GRAS_LRZ_FAST_CLEAR_BUFFER_BASE_HI */

		OUT_REG(ring, A6XX_RB_STENCIL_INFO(0));
	}
}

static bool
use_hw_binning(struct fd_batch *batch)
{
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;

	if ((gmem->maxpw * gmem->maxph) > 32)
		return false;

	return fd_binning_enabled && ((gmem->nbins_x * gmem->nbins_y) >= 2) &&
			(batch->num_draws > 0);
}

static void
patch_fb_read(struct fd_batch *batch)
{
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;

	for (unsigned i = 0; i < fd_patch_num_elements(&batch->fb_read_patches); i++) {
		struct fd_cs_patch *patch = fd_patch_element(&batch->fb_read_patches, i);
		*patch->cs = patch->val | A6XX_TEX_CONST_2_PITCH(gmem->bin_w * gmem->cbuf_cpp[0]);
	}
	util_dynarray_clear(&batch->fb_read_patches);
}

static void
update_render_cntl(struct fd_batch *batch, struct pipe_framebuffer_state *pfb, bool binning)
{
	struct fd_ringbuffer *ring = batch->gmem;
	uint32_t cntl = 0;
	bool depth_ubwc_enable = false;
	uint32_t mrts_ubwc_enable = 0;
	int i;

	if (pfb->zsbuf) {
		struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);
		depth_ubwc_enable = fd_resource_ubwc_enabled(rsc, pfb->zsbuf->u.tex.level);
	}

	for (i = 0; i < pfb->nr_cbufs; i++) {
		if (!pfb->cbufs[i])
			continue;

		struct pipe_surface *psurf = pfb->cbufs[i];
		struct fd_resource *rsc = fd_resource(psurf->texture);
		if (!rsc->bo)
			continue;

		if (fd_resource_ubwc_enabled(rsc, psurf->u.tex.level))
			mrts_ubwc_enable |= 1 << i;
	}

	cntl |= A6XX_RB_RENDER_CNTL_UNK4;
	if (binning)
		cntl |= A6XX_RB_RENDER_CNTL_BINNING;

	OUT_PKT7(ring, CP_REG_WRITE, 3);
	OUT_RING(ring, CP_REG_WRITE_0_TRACKER(TRACK_RENDER_CNTL));
	OUT_RING(ring, REG_A6XX_RB_RENDER_CNTL);
	OUT_RING(ring, cntl |
		COND(depth_ubwc_enable, A6XX_RB_RENDER_CNTL_FLAG_DEPTH) |
		A6XX_RB_RENDER_CNTL_FLAG_MRTS(mrts_ubwc_enable));
}

/* extra size to store VSC_DRAW_STRM_SIZE: */
#define VSC_DRAW_STRM_SIZE(pitch)  ((pitch) * 32 + 0x100)
#define VSC_PRIM_STRM_SIZE(pitch) ((pitch) * 32)

static void
update_vsc_pipe(struct fd_batch *batch)
{
	struct fd_context *ctx = batch->ctx;
	struct fd6_context *fd6_ctx = fd6_context(ctx);
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;
	struct fd_ringbuffer *ring = batch->gmem;
	int i;

	if (batch->draw_strm_bits/8 > fd6_ctx->vsc_draw_strm_pitch) {
		if (fd6_ctx->vsc_draw_strm)
			fd_bo_del(fd6_ctx->vsc_draw_strm);
		fd6_ctx->vsc_draw_strm = NULL;
		/* Note: probably only need to align to 0x40, but aligning stronger
		 * reduces the odds that we will have to realloc again on the next
		 * frame:
		 */
		fd6_ctx->vsc_draw_strm_pitch = align(batch->draw_strm_bits/8, 0x4000);
		debug_printf("pre-resize VSC_DRAW_STRM_PITCH to: 0x%x\n",
				fd6_ctx->vsc_draw_strm_pitch);
	}

	if (batch->prim_strm_bits/8 > fd6_ctx->vsc_prim_strm_pitch) {
		if (fd6_ctx->vsc_prim_strm)
			fd_bo_del(fd6_ctx->vsc_prim_strm);
		fd6_ctx->vsc_prim_strm = NULL;
		fd6_ctx->vsc_prim_strm_pitch = align(batch->prim_strm_bits/8, 0x4000);
		debug_printf("pre-resize VSC_PRIM_STRM_PITCH to: 0x%x\n",
				fd6_ctx->vsc_prim_strm_pitch);
	}

	if (!fd6_ctx->vsc_draw_strm) {
		fd6_ctx->vsc_draw_strm = fd_bo_new(ctx->screen->dev,
			VSC_DRAW_STRM_SIZE(fd6_ctx->vsc_draw_strm_pitch),
			DRM_FREEDRENO_GEM_TYPE_KMEM, "vsc_draw_strm");
	}

	if (!fd6_ctx->vsc_prim_strm) {
		fd6_ctx->vsc_prim_strm = fd_bo_new(ctx->screen->dev,
			VSC_PRIM_STRM_SIZE(fd6_ctx->vsc_prim_strm_pitch),
			DRM_FREEDRENO_GEM_TYPE_KMEM, "vsc_prim_strm");
	}

	OUT_REG(ring,
		A6XX_VSC_BIN_SIZE(.width = gmem->bin_w, .height = gmem->bin_h),
		A6XX_VSC_DRAW_STRM_SIZE_ADDRESS(
			.bo = fd6_ctx->vsc_draw_strm,
			.bo_offset = 32 * fd6_ctx->vsc_draw_strm_pitch));

	OUT_REG(ring, A6XX_VSC_BIN_COUNT(.nx = gmem->nbins_x,
					.ny = gmem->nbins_y));

	OUT_PKT4(ring, REG_A6XX_VSC_PIPE_CONFIG_REG(0), 32);
	for (i = 0; i < 32; i++) {
		const struct fd_vsc_pipe *pipe = &gmem->vsc_pipe[i];
		OUT_RING(ring, A6XX_VSC_PIPE_CONFIG_REG_X(pipe->x) |
				A6XX_VSC_PIPE_CONFIG_REG_Y(pipe->y) |
				A6XX_VSC_PIPE_CONFIG_REG_W(pipe->w) |
				A6XX_VSC_PIPE_CONFIG_REG_H(pipe->h));
	}

	OUT_REG(ring,
		A6XX_VSC_PRIM_STRM_ADDRESS(.bo = fd6_ctx->vsc_prim_strm),
		A6XX_VSC_PRIM_STRM_PITCH(.dword = fd6_ctx->vsc_prim_strm_pitch),
		A6XX_VSC_PRIM_STRM_LIMIT(.dword = fd6_ctx->vsc_prim_strm_pitch - 64));

	OUT_REG(ring,
		A6XX_VSC_DRAW_STRM_ADDRESS(.bo = fd6_ctx->vsc_draw_strm),
		A6XX_VSC_DRAW_STRM_PITCH(.dword = fd6_ctx->vsc_draw_strm_pitch),
		A6XX_VSC_DRAW_STRM_LIMIT(.dword = fd6_ctx->vsc_draw_strm_pitch - 64));
}

/*
 * If overflow is detected, either 0x1 (VSC_DRAW_STRM overflow) or 0x3
 * (VSC_PRIM_STRM overflow) plus the size of the overflowed buffer is
 * written to control->vsc_overflow.  This allows the CPU to
 * detect which buffer overflowed (and, since the current size is
 * encoded as well, this protects against already-submitted but
 * not executed batches from fooling the CPU into increasing the
 * size again unnecessarily).
 */
static void
emit_vsc_overflow_test(struct fd_batch *batch)
{
	struct fd_ringbuffer *ring = batch->gmem;
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;
	struct fd6_context *fd6_ctx = fd6_context(batch->ctx);

	debug_assert((fd6_ctx->vsc_draw_strm_pitch & 0x3) == 0);
	debug_assert((fd6_ctx->vsc_prim_strm_pitch & 0x3) == 0);

	/* Check for overflow, write vsc_scratch if detected: */
	for (int i = 0; i < gmem->num_vsc_pipes; i++) {
		OUT_PKT7(ring, CP_COND_WRITE5, 8);
		OUT_RING(ring, CP_COND_WRITE5_0_FUNCTION(WRITE_GE) |
				CP_COND_WRITE5_0_WRITE_MEMORY);
		OUT_RING(ring, CP_COND_WRITE5_1_POLL_ADDR_LO(REG_A6XX_VSC_DRAW_STRM_SIZE_REG(i)));
		OUT_RING(ring, CP_COND_WRITE5_2_POLL_ADDR_HI(0));
		OUT_RING(ring, CP_COND_WRITE5_3_REF(fd6_ctx->vsc_draw_strm_pitch - 64));
		OUT_RING(ring, CP_COND_WRITE5_4_MASK(~0));
		OUT_RELOC(ring, control_ptr(fd6_ctx, vsc_overflow));  /* WRITE_ADDR_LO/HI */
		OUT_RING(ring, CP_COND_WRITE5_7_WRITE_DATA(1 + fd6_ctx->vsc_draw_strm_pitch));

		OUT_PKT7(ring, CP_COND_WRITE5, 8);
		OUT_RING(ring, CP_COND_WRITE5_0_FUNCTION(WRITE_GE) |
				CP_COND_WRITE5_0_WRITE_MEMORY);
		OUT_RING(ring, CP_COND_WRITE5_1_POLL_ADDR_LO(REG_A6XX_VSC_PRIM_STRM_SIZE_REG(i)));
		OUT_RING(ring, CP_COND_WRITE5_2_POLL_ADDR_HI(0));
		OUT_RING(ring, CP_COND_WRITE5_3_REF(fd6_ctx->vsc_prim_strm_pitch - 64));
		OUT_RING(ring, CP_COND_WRITE5_4_MASK(~0));
		OUT_RELOC(ring, control_ptr(fd6_ctx, vsc_overflow));  /* WRITE_ADDR_LO/HI */
		OUT_RING(ring, CP_COND_WRITE5_7_WRITE_DATA(3 + fd6_ctx->vsc_prim_strm_pitch));
	}

	OUT_PKT7(ring, CP_WAIT_MEM_WRITES, 0);
}

static void
check_vsc_overflow(struct fd_context *ctx)
{
	struct fd6_context *fd6_ctx = fd6_context(ctx);
	struct fd6_control *control = fd_bo_map(fd6_ctx->control_mem);
	uint32_t vsc_overflow = control->vsc_overflow;

	if (!vsc_overflow)
		return;

	/* clear overflow flag: */
	control->vsc_overflow = 0;

	unsigned buffer = vsc_overflow & 0x3;
	unsigned size = vsc_overflow & ~0x3;

	if (buffer == 0x1) {
		/* VSC_DRAW_STRM overflow: */

		if (size < fd6_ctx->vsc_draw_strm_pitch) {
			/* we've already increased the size, this overflow is
			 * from a batch submitted before resize, but executed
			 * after
			 */
			return;
		}

		fd_bo_del(fd6_ctx->vsc_draw_strm);
		fd6_ctx->vsc_draw_strm = NULL;
		fd6_ctx->vsc_draw_strm_pitch *= 2;

		debug_printf("resized VSC_DRAW_STRM_PITCH to: 0x%x\n",
				fd6_ctx->vsc_draw_strm_pitch);

	} else if (buffer == 0x3) {
		/* VSC_PRIM_STRM overflow: */

		if (size < fd6_ctx->vsc_prim_strm_pitch) {
			/* we've already increased the size */
			return;
		}

		fd_bo_del(fd6_ctx->vsc_prim_strm);
		fd6_ctx->vsc_prim_strm = NULL;
		fd6_ctx->vsc_prim_strm_pitch *= 2;

		debug_printf("resized VSC_PRIM_STRM_PITCH to: 0x%x\n",
				fd6_ctx->vsc_prim_strm_pitch);

	} else {
		/* NOTE: it's possible, for example, for overflow to corrupt the
		 * control page.  I mostly just see this hit if I set initial VSC
		 * buffer size extremely small.  Things still seem to recover,
		 * but maybe we should pre-emptively realloc vsc_data/vsc_data2
		 * and hope for different memory placement?
		 */
		DBG("invalid vsc_overflow value: 0x%08x", vsc_overflow);
	}
}

/*
 * Emit conditional CP_INDIRECT_BRANCH based on VSC_STATE[p], ie. the IB
 * is skipped for tiles that have no visible geometry.
 */
static void
emit_conditional_ib(struct fd_batch *batch, const struct fd_tile *tile,
		struct fd_ringbuffer *target)
{
	struct fd_ringbuffer *ring = batch->gmem;

	if (target->cur == target->start)
		return;

	emit_marker6(ring, 6);

	unsigned count = fd_ringbuffer_cmd_count(target);

	BEGIN_RING(ring, 5 + 4 * count);  /* ensure conditional doesn't get split */

	OUT_PKT7(ring, CP_REG_TEST, 1);
	OUT_RING(ring, A6XX_CP_REG_TEST_0_REG(REG_A6XX_VSC_STATE_REG(tile->p)) |
			A6XX_CP_REG_TEST_0_BIT(tile->n) |
			A6XX_CP_REG_TEST_0_WAIT_FOR_ME);

	OUT_PKT7(ring, CP_COND_REG_EXEC, 2);
	OUT_RING(ring, CP_COND_REG_EXEC_0_MODE(PRED_TEST));
	OUT_RING(ring, CP_COND_REG_EXEC_1_DWORDS(4 * count));

	for (unsigned i = 0; i < count; i++) {
		uint32_t dwords;
		OUT_PKT7(ring, CP_INDIRECT_BUFFER, 3);
		dwords = fd_ringbuffer_emit_reloc_ring_full(ring, target, i) / 4;
		assert(dwords > 0);
		OUT_RING(ring, dwords);
	}

	emit_marker6(ring, 6);
}

static void
set_scissor(struct fd_ringbuffer *ring, uint32_t x1, uint32_t y1, uint32_t x2, uint32_t y2)
{
	OUT_REG(ring,
			A6XX_GRAS_SC_WINDOW_SCISSOR_TL(.x = x1, .y = y1),
			A6XX_GRAS_SC_WINDOW_SCISSOR_BR(.x = x2, .y = y2));

	OUT_REG(ring,
			A6XX_GRAS_2D_RESOLVE_CNTL_1(.x = x1, .y = y1),
			A6XX_GRAS_2D_RESOLVE_CNTL_2(.x = x2, .y = y2));
}

static void
set_bin_size(struct fd_ringbuffer *ring, uint32_t w, uint32_t h, uint32_t flag)
{
	OUT_REG(ring, A6XX_GRAS_BIN_CONTROL(.binw = w, .binh = h, .dword = flag));
	OUT_REG(ring, A6XX_RB_BIN_CONTROL(.binw = w, .binh = h, .dword = flag));
	/* no flag for RB_BIN_CONTROL2... */
	OUT_REG(ring, A6XX_RB_BIN_CONTROL2(.binw = w, .binh = h));
}

static void
emit_binning_pass(struct fd_batch *batch)
{
	struct fd_ringbuffer *ring = batch->gmem;
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;
	struct fd6_context *fd6_ctx = fd6_context(batch->ctx);

	debug_assert(!batch->tessellation);

	set_scissor(ring, 0, 0, gmem->width - 1, gmem->height - 1);

	emit_marker6(ring, 7);
	OUT_PKT7(ring, CP_SET_MARKER, 1);
	OUT_RING(ring, A6XX_CP_SET_MARKER_0_MODE(RM6_BINNING));
	emit_marker6(ring, 7);

	OUT_PKT7(ring, CP_SET_VISIBILITY_OVERRIDE, 1);
	OUT_RING(ring, 0x1);

	OUT_PKT7(ring, CP_SET_MODE, 1);
	OUT_RING(ring, 0x1);

	OUT_WFI5(ring);

	OUT_REG(ring, A6XX_VFD_MODE_CNTL(.binning_pass = true));

	update_vsc_pipe(batch);

	OUT_PKT4(ring, REG_A6XX_PC_UNKNOWN_9805, 1);
	OUT_RING(ring, fd6_ctx->magic.PC_UNKNOWN_9805);

	OUT_PKT4(ring, REG_A6XX_SP_UNKNOWN_A0F8, 1);
	OUT_RING(ring, fd6_ctx->magic.SP_UNKNOWN_A0F8);

	OUT_PKT7(ring, CP_EVENT_WRITE, 1);
	OUT_RING(ring, UNK_2C);

	OUT_PKT4(ring, REG_A6XX_RB_WINDOW_OFFSET, 1);
	OUT_RING(ring, A6XX_RB_WINDOW_OFFSET_X(0) |
			A6XX_RB_WINDOW_OFFSET_Y(0));

	OUT_PKT4(ring, REG_A6XX_SP_TP_WINDOW_OFFSET, 1);
	OUT_RING(ring, A6XX_SP_TP_WINDOW_OFFSET_X(0) |
			A6XX_SP_TP_WINDOW_OFFSET_Y(0));

	/* emit IB to binning drawcmds: */
	fd_log(batch, "GMEM: START BINNING IB");
	fd6_emit_ib(ring, batch->draw);
	fd_log(batch, "GMEM: END BINNING IB");

	fd_reset_wfi(batch);

	OUT_PKT7(ring, CP_SET_DRAW_STATE, 3);
	OUT_RING(ring, CP_SET_DRAW_STATE__0_COUNT(0) |
			CP_SET_DRAW_STATE__0_DISABLE_ALL_GROUPS |
			CP_SET_DRAW_STATE__0_GROUP_ID(0));
	OUT_RING(ring, CP_SET_DRAW_STATE__1_ADDR_LO(0));
	OUT_RING(ring, CP_SET_DRAW_STATE__2_ADDR_HI(0));

	OUT_PKT7(ring, CP_EVENT_WRITE, 1);
	OUT_RING(ring, UNK_2D);

	fd6_cache_inv(batch, ring);
	fd6_cache_flush(batch, ring);
	fd_wfi(batch, ring);

	OUT_PKT7(ring, CP_WAIT_FOR_ME, 0);

	fd_log(batch, "START VSC OVERFLOW TEST");
	emit_vsc_overflow_test(batch);
	fd_log(batch, "END VSC OVERFLOW TEST");

	OUT_PKT7(ring, CP_SET_VISIBILITY_OVERRIDE, 1);
	OUT_RING(ring, 0x0);

	OUT_PKT7(ring, CP_SET_MODE, 1);
	OUT_RING(ring, 0x0);

	OUT_WFI5(ring);

	OUT_PKT4(ring, REG_A6XX_RB_CCU_CNTL, 1);
	OUT_RING(ring, fd6_ctx->magic.RB_CCU_CNTL_gmem);
}

static void
emit_msaa(struct fd_ringbuffer *ring, unsigned nr)
{
	enum a3xx_msaa_samples samples = fd_msaa_samples(nr);

	OUT_PKT4(ring, REG_A6XX_SP_TP_RAS_MSAA_CNTL, 2);
	OUT_RING(ring, A6XX_SP_TP_RAS_MSAA_CNTL_SAMPLES(samples));
	OUT_RING(ring, A6XX_SP_TP_DEST_MSAA_CNTL_SAMPLES(samples) |
			 COND(samples == MSAA_ONE, A6XX_SP_TP_DEST_MSAA_CNTL_MSAA_DISABLE));

	OUT_PKT4(ring, REG_A6XX_GRAS_RAS_MSAA_CNTL, 2);
	OUT_RING(ring, A6XX_GRAS_RAS_MSAA_CNTL_SAMPLES(samples));
	OUT_RING(ring, A6XX_GRAS_DEST_MSAA_CNTL_SAMPLES(samples) |
			 COND(samples == MSAA_ONE, A6XX_GRAS_DEST_MSAA_CNTL_MSAA_DISABLE));

	OUT_PKT4(ring, REG_A6XX_RB_RAS_MSAA_CNTL, 2);
	OUT_RING(ring, A6XX_RB_RAS_MSAA_CNTL_SAMPLES(samples));
	OUT_RING(ring, A6XX_RB_DEST_MSAA_CNTL_SAMPLES(samples) |
			 COND(samples == MSAA_ONE, A6XX_RB_DEST_MSAA_CNTL_MSAA_DISABLE));

	OUT_PKT4(ring, REG_A6XX_RB_MSAA_CNTL, 1);
	OUT_RING(ring, A6XX_RB_MSAA_CNTL_SAMPLES(samples));
}

static void prepare_tile_setup_ib(struct fd_batch *batch);
static void prepare_tile_fini_ib(struct fd_batch *batch);

/* before first tile */
static void
fd6_emit_tile_init(struct fd_batch *batch)
{
	struct fd_context *ctx = batch->ctx;
	struct fd_ringbuffer *ring = batch->gmem;
	struct pipe_framebuffer_state *pfb = &batch->framebuffer;
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;

	fd6_emit_restore(batch, ring);

	fd6_emit_lrz_flush(ring);

	if (batch->prologue) {
		fd_log(batch, "START PROLOGUE");
		fd6_emit_ib(ring, batch->prologue);
		fd_log(batch, "END PROLOGUE");
	}

	fd6_cache_inv(batch, ring);

	prepare_tile_setup_ib(batch);
	prepare_tile_fini_ib(batch);

	OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_GLOBAL, 1);
	OUT_RING(ring, 0x0);

	/* blob controls "local" in IB2, but I think that is not required */
	OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_LOCAL, 1);
	OUT_RING(ring, 0x1);

	fd_wfi(batch, ring);
	OUT_PKT4(ring, REG_A6XX_RB_CCU_CNTL, 1);
	OUT_RING(ring, fd6_context(ctx)->magic.RB_CCU_CNTL_gmem);

	emit_zs(ring, pfb->zsbuf, batch->gmem_state);
	emit_mrt(ring, pfb, batch->gmem_state);
	emit_msaa(ring, pfb->samples);
	patch_fb_read(batch);

	if (use_hw_binning(batch)) {
		/* enable stream-out during binning pass: */
		OUT_REG(ring, A6XX_VPC_SO_DISABLE(false));

		set_bin_size(ring, gmem->bin_w, gmem->bin_h,
				A6XX_RB_BIN_CONTROL_BINNING_PASS | 0x6000000);
		update_render_cntl(batch, pfb, true);
		emit_binning_pass(batch);

		/* and disable stream-out for draw pass: */
		OUT_REG(ring, A6XX_VPC_SO_DISABLE(true));

		/*
		 * NOTE: even if we detect VSC overflow and disable use of
		 * visibility stream in draw pass, it is still safe to execute
		 * the reset of these cmds:
		 */

// NOTE a618 not setting .USE_VIZ .. from a quick check on a630, it
// does not appear that this bit changes much (ie. it isn't actually
// .USE_VIZ like previous gens)
		set_bin_size(ring, gmem->bin_w, gmem->bin_h,
				A6XX_RB_BIN_CONTROL_USE_VIZ | 0x6000000);

		OUT_PKT4(ring, REG_A6XX_VFD_MODE_CNTL, 1);
		OUT_RING(ring, 0x0);

		OUT_PKT4(ring, REG_A6XX_PC_UNKNOWN_9805, 1);
		OUT_RING(ring, fd6_context(ctx)->magic.PC_UNKNOWN_9805);

		OUT_PKT4(ring, REG_A6XX_SP_UNKNOWN_A0F8, 1);
		OUT_RING(ring, fd6_context(ctx)->magic.SP_UNKNOWN_A0F8);

		OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_GLOBAL, 1);
		OUT_RING(ring, 0x1);
	} else {
		/* no binning pass, so enable stream-out for draw pass:: */
		OUT_REG(ring, A6XX_VPC_SO_DISABLE(false));

		set_bin_size(ring, gmem->bin_w, gmem->bin_h, 0x6000000);
	}

	update_render_cntl(batch, pfb, false);
}

static void
set_window_offset(struct fd_ringbuffer *ring, uint32_t x1, uint32_t y1)
{
	OUT_PKT4(ring, REG_A6XX_RB_WINDOW_OFFSET, 1);
	OUT_RING(ring, A6XX_RB_WINDOW_OFFSET_X(x1) |
			A6XX_RB_WINDOW_OFFSET_Y(y1));

	OUT_PKT4(ring, REG_A6XX_RB_WINDOW_OFFSET2, 1);
	OUT_RING(ring, A6XX_RB_WINDOW_OFFSET2_X(x1) |
			A6XX_RB_WINDOW_OFFSET2_Y(y1));

	OUT_PKT4(ring, REG_A6XX_SP_WINDOW_OFFSET, 1);
	OUT_RING(ring, A6XX_SP_WINDOW_OFFSET_X(x1) |
			A6XX_SP_WINDOW_OFFSET_Y(y1));

	OUT_PKT4(ring, REG_A6XX_SP_TP_WINDOW_OFFSET, 1);
	OUT_RING(ring, A6XX_SP_TP_WINDOW_OFFSET_X(x1) |
			A6XX_SP_TP_WINDOW_OFFSET_Y(y1));
}

/* before mem2gmem */
static void
fd6_emit_tile_prep(struct fd_batch *batch, const struct fd_tile *tile)
{
	struct fd_context *ctx = batch->ctx;
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;
	struct fd6_context *fd6_ctx = fd6_context(ctx);
	struct fd_ringbuffer *ring = batch->gmem;

	emit_marker6(ring, 7);
	OUT_PKT7(ring, CP_SET_MARKER, 1);
	OUT_RING(ring, A6XX_CP_SET_MARKER_0_MODE(RM6_GMEM));
	emit_marker6(ring, 7);

	uint32_t x1 = tile->xoff;
	uint32_t y1 = tile->yoff;
	uint32_t x2 = tile->xoff + tile->bin_w - 1;
	uint32_t y2 = tile->yoff + tile->bin_h - 1;

	set_scissor(ring, x1, y1, x2, y2);

	if (use_hw_binning(batch)) {
		const struct fd_vsc_pipe *pipe = &gmem->vsc_pipe[tile->p];

		OUT_PKT7(ring, CP_WAIT_FOR_ME, 0);

		OUT_PKT7(ring, CP_SET_MODE, 1);
		OUT_RING(ring, 0x0);

		OUT_PKT7(ring, CP_SET_BIN_DATA5, 7);
		OUT_RING(ring, CP_SET_BIN_DATA5_0_VSC_SIZE(pipe->w * pipe->h) |
				CP_SET_BIN_DATA5_0_VSC_N(tile->n));
		OUT_RELOC(ring, fd6_ctx->vsc_draw_strm,       /* per-pipe draw-stream address */
				(tile->p * fd6_ctx->vsc_draw_strm_pitch), 0, 0);
		OUT_RELOC(ring, fd6_ctx->vsc_draw_strm,       /* VSC_DRAW_STRM_ADDRESS + (p * 4) */
				(tile->p * 4) + (32 * fd6_ctx->vsc_draw_strm_pitch), 0, 0);
		OUT_RELOC(ring, fd6_ctx->vsc_prim_strm,
				(tile->p * fd6_ctx->vsc_prim_strm_pitch), 0, 0);

		OUT_PKT7(ring, CP_SET_VISIBILITY_OVERRIDE, 1);
		OUT_RING(ring, 0x0);

		set_window_offset(ring, x1, y1);

		const struct fd_gmem_stateobj *gmem = batch->gmem_state;
		set_bin_size(ring, gmem->bin_w, gmem->bin_h, 0x6000000);

		OUT_PKT7(ring, CP_SET_MODE, 1);
		OUT_RING(ring, 0x0);
	} else {
		set_window_offset(ring, x1, y1);

		OUT_PKT7(ring, CP_SET_VISIBILITY_OVERRIDE, 1);
		OUT_RING(ring, 0x1);

		OUT_PKT7(ring, CP_SET_MODE, 1);
		OUT_RING(ring, 0x0);
	}
}

static void
set_blit_scissor(struct fd_batch *batch, struct fd_ringbuffer *ring)
{
	struct pipe_scissor_state blit_scissor = batch->max_scissor;

	blit_scissor.minx = ROUND_DOWN_TO(blit_scissor.minx, 16);
	blit_scissor.miny = ROUND_DOWN_TO(blit_scissor.miny, 4);
	blit_scissor.maxx = ALIGN(blit_scissor.maxx, 16);
	blit_scissor.maxy = ALIGN(blit_scissor.maxy, 4);

	OUT_PKT4(ring, REG_A6XX_RB_BLIT_SCISSOR_TL, 2);
	OUT_RING(ring,
			 A6XX_RB_BLIT_SCISSOR_TL_X(blit_scissor.minx) |
			 A6XX_RB_BLIT_SCISSOR_TL_Y(blit_scissor.miny));
	OUT_RING(ring,
			 A6XX_RB_BLIT_SCISSOR_BR_X(blit_scissor.maxx - 1) |
			 A6XX_RB_BLIT_SCISSOR_BR_Y(blit_scissor.maxy - 1));
}

static void
emit_blit(struct fd_batch *batch,
		  struct fd_ringbuffer *ring,
		  uint32_t base,
		  struct pipe_surface *psurf,
		  bool stencil)
{
	struct fd_resource *rsc = fd_resource(psurf->texture);
	enum pipe_format pfmt = psurf->format;
	uint32_t offset;
	bool ubwc_enabled;

	debug_assert(psurf->u.tex.first_layer == psurf->u.tex.last_layer);

	/* separate stencil case: */
	if (stencil) {
		rsc = rsc->stencil;
		pfmt = rsc->base.format;
	}

	offset = fd_resource_offset(rsc, psurf->u.tex.level,
			psurf->u.tex.first_layer);
	ubwc_enabled = fd_resource_ubwc_enabled(rsc, psurf->u.tex.level);

	debug_assert(psurf->u.tex.first_layer == psurf->u.tex.last_layer);

	enum a6xx_format format = fd6_pipe2color(pfmt);
	uint32_t stride = fd_resource_pitch(rsc, psurf->u.tex.level);
	uint32_t size = fd_resource_slice(rsc, psurf->u.tex.level)->size0;
	enum a3xx_color_swap swap = fd6_resource_swap(rsc, pfmt);
	enum a3xx_msaa_samples samples =
			fd_msaa_samples(rsc->base.nr_samples);
	uint32_t tile_mode = fd_resource_tile_mode(&rsc->base, psurf->u.tex.level);

	OUT_REG(ring,
		A6XX_RB_BLIT_DST_INFO(.tile_mode = tile_mode, .samples = samples,
			.color_format = format, .color_swap = swap, .flags = ubwc_enabled),
		A6XX_RB_BLIT_DST(.bo = rsc->bo, .bo_offset = offset),
		A6XX_RB_BLIT_DST_PITCH(.a6xx_rb_blit_dst_pitch = stride),
		A6XX_RB_BLIT_DST_ARRAY_PITCH(.a6xx_rb_blit_dst_array_pitch = size));

	OUT_REG(ring, A6XX_RB_BLIT_BASE_GMEM(.dword = base));

	if (ubwc_enabled) {
		OUT_PKT4(ring, REG_A6XX_RB_BLIT_FLAG_DST_LO, 3);
		fd6_emit_flag_reference(ring, rsc,
				psurf->u.tex.level, psurf->u.tex.first_layer);
	}

	fd6_emit_blit(batch, ring);
}

static void
emit_restore_blit(struct fd_batch *batch,
				  struct fd_ringbuffer *ring,
				  uint32_t base,
				  struct pipe_surface *psurf,
				  unsigned buffer)
{
	bool stencil = (buffer == FD_BUFFER_STENCIL);

	OUT_REG(ring, A6XX_RB_BLIT_INFO(
		.gmem = true, .unk0 = true,
		.depth = (buffer == FD_BUFFER_DEPTH),
		.integer = util_format_is_pure_integer(psurf->format)));

	emit_blit(batch, ring, base, psurf, stencil);
}

static void
emit_clears(struct fd_batch *batch, struct fd_ringbuffer *ring)
{
	struct pipe_framebuffer_state *pfb = &batch->framebuffer;
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;
	enum a3xx_msaa_samples samples = fd_msaa_samples(pfb->samples);

	uint32_t buffers = batch->fast_cleared;

	if (buffers & PIPE_CLEAR_COLOR) {

		for (int i = 0; i < pfb->nr_cbufs; i++) {
			union pipe_color_union *color = &batch->clear_color[i];
			union util_color uc = {0};

			if (!pfb->cbufs[i])
				continue;

			if (!(buffers & (PIPE_CLEAR_COLOR0 << i)))
				continue;

			enum pipe_format pfmt = pfb->cbufs[i]->format;

			// XXX I think RB_CLEAR_COLOR_DWn wants to take into account SWAP??
			union pipe_color_union swapped;
			switch (fd6_pipe2swap(pfmt)) {
			case WZYX:
				swapped.ui[0] = color->ui[0];
				swapped.ui[1] = color->ui[1];
				swapped.ui[2] = color->ui[2];
				swapped.ui[3] = color->ui[3];
				break;
			case WXYZ:
				swapped.ui[2] = color->ui[0];
				swapped.ui[1] = color->ui[1];
				swapped.ui[0] = color->ui[2];
				swapped.ui[3] = color->ui[3];
				break;
			case ZYXW:
				swapped.ui[3] = color->ui[0];
				swapped.ui[0] = color->ui[1];
				swapped.ui[1] = color->ui[2];
				swapped.ui[2] = color->ui[3];
				break;
			case XYZW:
				swapped.ui[3] = color->ui[0];
				swapped.ui[2] = color->ui[1];
				swapped.ui[1] = color->ui[2];
				swapped.ui[0] = color->ui[3];
				break;
			}

			util_pack_color_union(pfmt, &uc, &swapped);

			OUT_PKT4(ring, REG_A6XX_RB_BLIT_DST_INFO, 1);
			OUT_RING(ring, A6XX_RB_BLIT_DST_INFO_TILE_MODE(TILE6_LINEAR) |
				A6XX_RB_BLIT_DST_INFO_SAMPLES(samples) |
				A6XX_RB_BLIT_DST_INFO_COLOR_FORMAT(fd6_pipe2color(pfmt)));

			OUT_PKT4(ring, REG_A6XX_RB_BLIT_INFO, 1);
			OUT_RING(ring, A6XX_RB_BLIT_INFO_GMEM |
				A6XX_RB_BLIT_INFO_CLEAR_MASK(0xf));

			OUT_PKT4(ring, REG_A6XX_RB_BLIT_BASE_GMEM, 1);
			OUT_RING(ring, gmem->cbuf_base[i]);

			OUT_PKT4(ring, REG_A6XX_RB_UNKNOWN_88D0, 1);
			OUT_RING(ring, 0);

			OUT_PKT4(ring, REG_A6XX_RB_BLIT_CLEAR_COLOR_DW0, 4);
			OUT_RING(ring, uc.ui[0]);
			OUT_RING(ring, uc.ui[1]);
			OUT_RING(ring, uc.ui[2]);
			OUT_RING(ring, uc.ui[3]);

			fd6_emit_blit(batch, ring);
		}
	}

	const bool has_depth = pfb->zsbuf;
	const bool has_separate_stencil =
		has_depth && fd_resource(pfb->zsbuf->texture)->stencil;

	/* First clear depth or combined depth/stencil. */
	if ((has_depth && (buffers & PIPE_CLEAR_DEPTH)) ||
		(!has_separate_stencil && (buffers & PIPE_CLEAR_STENCIL))) {
		enum pipe_format pfmt = pfb->zsbuf->format;
		uint32_t clear_value;
		uint32_t mask = 0;

		if (has_separate_stencil) {
			pfmt = util_format_get_depth_only(pfb->zsbuf->format);
			clear_value = util_pack_z(pfmt, batch->clear_depth);
		} else {
			pfmt = pfb->zsbuf->format;
			clear_value = util_pack_z_stencil(pfmt, batch->clear_depth,
											  batch->clear_stencil);
		}

		if (buffers & PIPE_CLEAR_DEPTH)
			mask |= 0x1;

		if (!has_separate_stencil && (buffers & PIPE_CLEAR_STENCIL))
			mask |= 0x2;

		OUT_PKT4(ring, REG_A6XX_RB_BLIT_DST_INFO, 1);
		OUT_RING(ring, A6XX_RB_BLIT_DST_INFO_TILE_MODE(TILE6_LINEAR) |
			A6XX_RB_BLIT_DST_INFO_SAMPLES(samples) |
			A6XX_RB_BLIT_DST_INFO_COLOR_FORMAT(fd6_pipe2color(pfmt)));

		OUT_PKT4(ring, REG_A6XX_RB_BLIT_INFO, 1);
		OUT_RING(ring, A6XX_RB_BLIT_INFO_GMEM |
			// XXX UNK0 for separate stencil ??
			A6XX_RB_BLIT_INFO_DEPTH |
			A6XX_RB_BLIT_INFO_CLEAR_MASK(mask));

		OUT_PKT4(ring, REG_A6XX_RB_BLIT_BASE_GMEM, 1);
		OUT_RING(ring, gmem->zsbuf_base[0]);

		OUT_PKT4(ring, REG_A6XX_RB_UNKNOWN_88D0, 1);
		OUT_RING(ring, 0);

		OUT_PKT4(ring, REG_A6XX_RB_BLIT_CLEAR_COLOR_DW0, 1);
		OUT_RING(ring, clear_value);

		fd6_emit_blit(batch, ring);
	}

	/* Then clear the separate stencil buffer in case of 32 bit depth
	 * formats with separate stencil. */
	if (has_separate_stencil && (buffers & PIPE_CLEAR_STENCIL)) {
		OUT_PKT4(ring, REG_A6XX_RB_BLIT_DST_INFO, 1);
		OUT_RING(ring, A6XX_RB_BLIT_DST_INFO_TILE_MODE(TILE6_LINEAR) |
				 A6XX_RB_BLIT_DST_INFO_SAMPLES(samples) |
				 A6XX_RB_BLIT_DST_INFO_COLOR_FORMAT(FMT6_8_UINT));

		OUT_PKT4(ring, REG_A6XX_RB_BLIT_INFO, 1);
		OUT_RING(ring, A6XX_RB_BLIT_INFO_GMEM |
				 //A6XX_RB_BLIT_INFO_UNK0 |
				 A6XX_RB_BLIT_INFO_DEPTH |
				 A6XX_RB_BLIT_INFO_CLEAR_MASK(0x1));

		OUT_PKT4(ring, REG_A6XX_RB_BLIT_BASE_GMEM, 1);
		OUT_RING(ring, gmem->zsbuf_base[1]);

		OUT_PKT4(ring, REG_A6XX_RB_UNKNOWN_88D0, 1);
		OUT_RING(ring, 0);

		OUT_PKT4(ring, REG_A6XX_RB_BLIT_CLEAR_COLOR_DW0, 1);
		OUT_RING(ring, batch->clear_stencil & 0xff);

		fd6_emit_blit(batch, ring);
	}
}

/*
 * transfer from system memory to gmem
 */
static void
emit_restore_blits(struct fd_batch *batch, struct fd_ringbuffer *ring)
{
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;
	struct pipe_framebuffer_state *pfb = &batch->framebuffer;

	if (batch->restore & FD_BUFFER_COLOR) {
		unsigned i;
		for (i = 0; i < pfb->nr_cbufs; i++) {
			if (!pfb->cbufs[i])
				continue;
			if (!(batch->restore & (PIPE_CLEAR_COLOR0 << i)))
				continue;
			emit_restore_blit(batch, ring, gmem->cbuf_base[i], pfb->cbufs[i],
							  FD_BUFFER_COLOR);
		}
	}

	if (batch->restore & (FD_BUFFER_DEPTH | FD_BUFFER_STENCIL)) {
		struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);

		if (!rsc->stencil || (batch->restore & FD_BUFFER_DEPTH)) {
			emit_restore_blit(batch, ring, gmem->zsbuf_base[0], pfb->zsbuf,
							  FD_BUFFER_DEPTH);
		}
		if (rsc->stencil && (batch->restore & FD_BUFFER_STENCIL)) {
			emit_restore_blit(batch, ring, gmem->zsbuf_base[1], pfb->zsbuf,
							  FD_BUFFER_STENCIL);
		}
	}
}

static void
prepare_tile_setup_ib(struct fd_batch *batch)
{
	batch->tile_setup = fd_submit_new_ringbuffer(batch->submit, 0x1000,
			FD_RINGBUFFER_STREAMING);

	set_blit_scissor(batch, batch->tile_setup);

	emit_restore_blits(batch, batch->tile_setup);
	emit_clears(batch, batch->tile_setup);
}

/*
 * transfer from system memory to gmem
 */
static void
fd6_emit_tile_mem2gmem(struct fd_batch *batch, const struct fd_tile *tile)
{
}

/* before IB to rendering cmds: */
static void
fd6_emit_tile_renderprep(struct fd_batch *batch, const struct fd_tile *tile)
{
	fd_log(batch, "TILE: START CLEAR/RESTORE");
	if (batch->fast_cleared || !use_hw_binning(batch)) {
		fd6_emit_ib(batch->gmem, batch->tile_setup);
	} else {
		emit_conditional_ib(batch, tile, batch->tile_setup);
	}
	fd_log(batch, "TILE: END CLEAR/RESTORE");
}

static void
emit_resolve_blit(struct fd_batch *batch,
				  struct fd_ringbuffer *ring,
				  uint32_t base,
				  struct pipe_surface *psurf,
				  unsigned buffer)
{
	uint32_t info = 0;
	bool stencil = false;

	if (!fd_resource(psurf->texture)->valid)
		return;

	switch (buffer) {
	case FD_BUFFER_COLOR:
		break;
	case FD_BUFFER_STENCIL:
		info |= A6XX_RB_BLIT_INFO_UNK0;
		stencil = true;
		break;
	case FD_BUFFER_DEPTH:
		info |= A6XX_RB_BLIT_INFO_DEPTH;
		break;
	}

	if (util_format_is_pure_integer(psurf->format))
		info |= A6XX_RB_BLIT_INFO_INTEGER;

	OUT_PKT4(ring, REG_A6XX_RB_BLIT_INFO, 1);
	OUT_RING(ring, info);

	emit_blit(batch, ring, base, psurf, stencil);
}

/*
 * transfer from gmem to system memory (ie. normal RAM)
 */

static void
prepare_tile_fini_ib(struct fd_batch *batch)
{
	const struct fd_gmem_stateobj *gmem = batch->gmem_state;
	struct pipe_framebuffer_state *pfb = &batch->framebuffer;
	struct fd_ringbuffer *ring;

	batch->tile_fini = fd_submit_new_ringbuffer(batch->submit, 0x1000,
			FD_RINGBUFFER_STREAMING);
	ring = batch->tile_fini;

	set_blit_scissor(batch, ring);

	if (batch->resolve & (FD_BUFFER_DEPTH | FD_BUFFER_STENCIL)) {
		struct fd_resource *rsc = fd_resource(pfb->zsbuf->texture);

		if (!rsc->stencil || (batch->resolve & FD_BUFFER_DEPTH)) {
			emit_resolve_blit(batch, ring,
							  gmem->zsbuf_base[0], pfb->zsbuf,
							  FD_BUFFER_DEPTH);
		}
		if (rsc->stencil && (batch->resolve & FD_BUFFER_STENCIL)) {
			emit_resolve_blit(batch, ring,
							  gmem->zsbuf_base[1], pfb->zsbuf,
							  FD_BUFFER_STENCIL);
		}
	}

	if (batch->resolve & FD_BUFFER_COLOR) {
		unsigned i;
		for (i = 0; i < pfb->nr_cbufs; i++) {
			if (!pfb->cbufs[i])
				continue;
			if (!(batch->resolve & (PIPE_CLEAR_COLOR0 << i)))
				continue;
			emit_resolve_blit(batch, ring, gmem->cbuf_base[i], pfb->cbufs[i],
							  FD_BUFFER_COLOR);
		}
	}
}

static void
fd6_emit_tile(struct fd_batch *batch, const struct fd_tile *tile)
{
	if (!use_hw_binning(batch)) {
		fd6_emit_ib(batch->gmem, batch->draw);
	} else {
		emit_conditional_ib(batch, tile, batch->draw);
	}

	if (batch->epilogue)
		fd6_emit_ib(batch->gmem, batch->epilogue);
}

static void
fd6_emit_tile_gmem2mem(struct fd_batch *batch, const struct fd_tile *tile)
{
	struct fd_ringbuffer *ring = batch->gmem;

	if (use_hw_binning(batch)) {
		OUT_PKT7(ring, CP_SET_MARKER, 1);
		OUT_RING(ring, A6XX_CP_SET_MARKER_0_MODE(RM6_ENDVIS));
	}

	OUT_PKT7(ring, CP_SET_DRAW_STATE, 3);
	OUT_RING(ring, CP_SET_DRAW_STATE__0_COUNT(0) |
			CP_SET_DRAW_STATE__0_DISABLE_ALL_GROUPS |
			CP_SET_DRAW_STATE__0_GROUP_ID(0));
	OUT_RING(ring, CP_SET_DRAW_STATE__1_ADDR_LO(0));
	OUT_RING(ring, CP_SET_DRAW_STATE__2_ADDR_HI(0));

	OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_LOCAL, 1);
	OUT_RING(ring, 0x0);

	emit_marker6(ring, 7);
	OUT_PKT7(ring, CP_SET_MARKER, 1);
	OUT_RING(ring, A6XX_CP_SET_MARKER_0_MODE(RM6_RESOLVE));
	emit_marker6(ring, 7);

	fd_log(batch, "TILE: START RESOLVE");
	if (batch->fast_cleared || !use_hw_binning(batch)) {
		fd6_emit_ib(batch->gmem, batch->tile_fini);
	} else {
		emit_conditional_ib(batch, tile, batch->tile_fini);
	}
	fd_log(batch, "TILE: END RESOLVE");
}

static void
fd6_emit_tile_fini(struct fd_batch *batch)
{
	struct fd_ringbuffer *ring = batch->gmem;

	OUT_PKT4(ring, REG_A6XX_GRAS_LRZ_CNTL, 1);
	OUT_RING(ring, A6XX_GRAS_LRZ_CNTL_ENABLE);

	fd6_emit_lrz_flush(ring);

	fd6_event_write(batch, ring, PC_CCU_RESOLVE_TS, true);

	if (use_hw_binning(batch)) {
		check_vsc_overflow(batch->ctx);
	}
}

static void
emit_sysmem_clears(struct fd_batch *batch, struct fd_ringbuffer *ring)
{
	struct fd_context *ctx = batch->ctx;
	struct pipe_framebuffer_state *pfb = &batch->framebuffer;

	uint32_t buffers = batch->fast_cleared;

	if (buffers & PIPE_CLEAR_COLOR) {
		for (int i = 0; i < pfb->nr_cbufs; i++) {
			union pipe_color_union *color = &batch->clear_color[i];

			if (!pfb->cbufs[i])
				continue;

			if (!(buffers & (PIPE_CLEAR_COLOR0 << i)))
				continue;

			fd6_clear_surface(ctx, ring,
					pfb->cbufs[i], pfb->width, pfb->height, color);
		}
	}
	if (buffers & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL)) {
		union pipe_color_union value = {};

		const bool has_depth = pfb->zsbuf;
		struct pipe_resource *separate_stencil =
			has_depth && fd_resource(pfb->zsbuf->texture)->stencil ?
			&fd_resource(pfb->zsbuf->texture)->stencil->base : NULL;

		if ((has_depth && (buffers & PIPE_CLEAR_DEPTH)) ||
				(!separate_stencil && (buffers & PIPE_CLEAR_STENCIL))) {
			value.f[0] = batch->clear_depth;
			value.ui[1] = batch->clear_stencil;
			fd6_clear_surface(ctx, ring,
					pfb->zsbuf, pfb->width, pfb->height, &value);
		}

		if (separate_stencil && (buffers & PIPE_CLEAR_STENCIL)) {
			value.ui[0] = batch->clear_stencil;

			struct pipe_surface stencil_surf = *pfb->zsbuf;
			stencil_surf.format = PIPE_FORMAT_S8_UINT;
			stencil_surf.texture = separate_stencil;

			fd6_clear_surface(ctx, ring,
					&stencil_surf, pfb->width, pfb->height, &value);
		}
	}

	fd6_event_write(batch, ring, PC_CCU_FLUSH_COLOR_TS, true);
}

static void
setup_tess_buffers(struct fd_batch *batch, struct fd_ringbuffer *ring)
{
	struct fd_context *ctx = batch->ctx;

	batch->tessfactor_bo = fd_bo_new(ctx->screen->dev,
			batch->tessfactor_size,
			DRM_FREEDRENO_GEM_TYPE_KMEM, "tessfactor");

	batch->tessparam_bo = fd_bo_new(ctx->screen->dev,
			batch->tessparam_size,
			DRM_FREEDRENO_GEM_TYPE_KMEM, "tessparam");

	OUT_PKT4(ring, REG_A6XX_PC_TESSFACTOR_ADDR_LO, 2);
	OUT_RELOC(ring, batch->tessfactor_bo, 0, 0, 0);

	batch->tess_addrs_constobj->cur = batch->tess_addrs_constobj->start;
	OUT_RELOC(batch->tess_addrs_constobj, batch->tessparam_bo, 0, 0, 0);
	OUT_RELOC(batch->tess_addrs_constobj, batch->tessfactor_bo, 0, 0, 0);
}

static void
fd6_emit_sysmem_prep(struct fd_batch *batch)
{
	struct fd_ringbuffer *ring = batch->gmem;

	fd6_emit_restore(batch, ring);
	fd6_emit_lrz_flush(ring);

	if (batch->prologue) {
		fd_log(batch, "START PROLOGUE");
		fd6_emit_ib(ring, batch->prologue);
		fd_log(batch, "END PROLOGUE");
	}

	/* remaining setup below here does not apply to blit/compute: */
	if (batch->nondraw)
		return;

	struct pipe_framebuffer_state *pfb = &batch->framebuffer;

	if (pfb->width > 0 && pfb->height > 0)
		set_scissor(ring, 0, 0, pfb->width - 1, pfb->height - 1);
	else
		set_scissor(ring, 0, 0, 0, 0);

	set_window_offset(ring, 0, 0);

	set_bin_size(ring, 0, 0, 0xc00000); /* 0xc00000 = BYPASS? */

	emit_sysmem_clears(batch, ring);

	emit_marker6(ring, 7);
	OUT_PKT7(ring, CP_SET_MARKER, 1);
	OUT_RING(ring, A6XX_CP_SET_MARKER_0_MODE(RM6_BYPASS));
	emit_marker6(ring, 7);

	if (batch->tessellation)
		setup_tess_buffers(batch, ring);

	OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_GLOBAL, 1);
	OUT_RING(ring, 0x0);

	/* blob controls "local" in IB2, but I think that is not required */
	OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_LOCAL, 1);
	OUT_RING(ring, 0x1);

	fd6_event_write(batch, ring, PC_CCU_INVALIDATE_COLOR, false);
	fd6_cache_inv(batch, ring);

	fd_wfi(batch, ring);
	OUT_PKT4(ring, REG_A6XX_RB_CCU_CNTL, 1);
	OUT_RING(ring, fd6_context(batch->ctx)->magic.RB_CCU_CNTL_bypass);

	/* enable stream-out, with sysmem there is only one pass: */
	OUT_REG(ring, A6XX_VPC_SO_DISABLE(false));

	OUT_PKT7(ring, CP_SET_VISIBILITY_OVERRIDE, 1);
	OUT_RING(ring, 0x1);

	emit_zs(ring, pfb->zsbuf, NULL);
	emit_mrt(ring, pfb, NULL);
	emit_msaa(ring, pfb->samples);

	update_render_cntl(batch, pfb, false);
}

static void
fd6_emit_sysmem_fini(struct fd_batch *batch)
{
	struct fd_ringbuffer *ring = batch->gmem;

	if (batch->epilogue)
		fd6_emit_ib(batch->gmem, batch->epilogue);

	OUT_PKT7(ring, CP_SKIP_IB2_ENABLE_GLOBAL, 1);
	OUT_RING(ring, 0x0);

	fd6_emit_lrz_flush(ring);

	fd6_event_write(batch, ring, PC_CCU_FLUSH_COLOR_TS, true);
}

void
fd6_gmem_init(struct pipe_context *pctx)
{
	struct fd_context *ctx = fd_context(pctx);

	ctx->emit_tile_init = fd6_emit_tile_init;
	ctx->emit_tile_prep = fd6_emit_tile_prep;
	ctx->emit_tile_mem2gmem = fd6_emit_tile_mem2gmem;
	ctx->emit_tile_renderprep = fd6_emit_tile_renderprep;
	ctx->emit_tile = fd6_emit_tile;
	ctx->emit_tile_gmem2mem = fd6_emit_tile_gmem2mem;
	ctx->emit_tile_fini = fd6_emit_tile_fini;
	ctx->emit_sysmem_prep = fd6_emit_sysmem_prep;
	ctx->emit_sysmem_fini = fd6_emit_sysmem_fini;
}
